AutoCodes – Jeep – B2390 Jeep

B2390 Jeep Code - Mist Switch Circuit Low

Quick Answer

The Cluster monitors the Mist Switch Circuit. Common causes include Faulty Multifunction Switch, Multifunction Switch harness is open or shorted, Multifunction Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2390 Jeep indicates Mist Switch Circuit Low.
Common causes: Common causes include Faulty Multifunction Switch, Multifunction Switch harness is open or shorted, Multifunction Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,733

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2390 Jeep Description

The Cluster monitors the Mist Switch Circuit. The Diagnostic Trouble Code (DTC) is set when the Cluster detects the Mist function inoperative.

OBDII Code B2390 Jeep - Mist Switch Circuit Low - AutoCodes.com — B2390 Jeep Code - Mist Switch Circuit Low

What does this mean?

What are the Possible Causes of the DTC B2390 Jeep?

Faulty Multifunction Switch
Multifunction Switch harness is open or shorted
Multifunction Switch circuit poor electrical connection
Faulty Cluster

How to Fix the DTC B2390 Jeep?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2390 Jeep code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2390 Jeep Code

1. What are the common symptoms of OBDII code B2390 (Jeep) Mist Switch Circuit Low?

The common symptoms include malfunctioning mist wiper function, inoperative windshield wipers, and the inability to control wiper speed effectively.

2. What are the typical causes of OBDII code B2390 (Jeep) Mist Switch Circuit Low?

The usual causes are a faulty mist switch, damaged wiring or connectors in the wiper circuit, or a malfunctioning wiper control module.

3. How can I diagnose the issue related to OBDII code B2390 (Jeep) Mist Switch Circuit Low?

You can start by checking the condition of the mist switch, inspecting the wiring and connectors for any visible damage, and testing the wiper control module for proper functionality.

4. Can a DIY enthusiast repair OBDII code B2390 (Jeep) Mist Switch Circuit Low?

Yes, if you have basic automotive repair knowledge and the necessary tools, you may be able to replace a faulty mist switch or repair damaged wiring yourself. However, more complex issues like a malfunctioning control module may require professional assistance.

5. Is it safe to continue driving with OBDII code B2390 (Jeep) Mist Switch Circuit Low?

It is not recommended to drive with this issue unresolved, especially if your windshield wipers are not functioning correctly. Visibility can be compromised during adverse weather conditions, increasing the risk of accidents.

6. How much does it typically cost to repair OBDII code B2390 (Jeep) Mist Switch Circuit Low?

The cost of repair can vary depending on the exact cause of the issue and whether you choose to do the repairs yourself or seek professional help. Replacing a mist switch or repairing wiring may be relatively inexpensive, while a faulty control module can be more costly.

7. Are there any preventive measures to avoid OBDII code B2390 (Jeep) Mist Switch Circuit Low in the future?

To prevent this issue, it's essential to maintain your vehicle's wiper system regularly, including checking for any signs of wear or damage, ensuring proper electrical connections, and addressing any wiper-related problems promptly.

8. Can extreme weather conditions contribute to triggering OBDII code B2390 (Jeep) Mist Switch Circuit Low?

While extreme weather conditions may not directly cause this error code, they can exacerbate existing issues with the wiper system, such as increased strain on components or exposure to moisture leading to corrosion.

9. Will resetting the OBDII system clear the B2390 (Jeep) Mist Switch Circuit Low code?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the Mist Switch Circuit Low problem is not addressed, the code is likely to reappear upon subsequent scans.

10. How long does it take to repair OBDII code B2390 (Jeep) Mist Switch Circuit Low?

The repair time can vary depending on the complexity of the issue and the availability of parts. Simple fixes like replacing a mist switch can be completed within an hour or two, while more involved repairs may take longer, especially if diagnostics are required.